1939 Lauson RSM 1hp inboard boat marine engine aircooled motor air cooled

I blinged this 1 up to attract attention at shows. It was made of several parts engines using original marine hardware from the worst 1. 1hp @2300 rpm, 5.9 cu. in. , 2" bore, 1 7/8 stroke. Weighs 32 lbs. Its mounted on oak stringers at 13 degrees. The marine carb manifold is adjustable to make the carb float bowel level when the engine is tilted. Not the smallest lauson inboard at that time. The model RLM was the smallest @ 3/4hp, 1 3/4" bore. Crankshaft thrust bearing information video after the engine video.

[@safetymikeengland]

I love using a drill to start an old engine. Beats the heck out of pulling a rope.

[@wrenchguy]

especially when u got worn out shoulders and it's hard starting.

[@safetymikeengland]

good job, mike!
that's a neat little engine.
thanks for sharing.

Lose the beer stickers.